Download Wind Direction transmitter

Wind Direction Transmitter
Instruction for use 4.3121.32.000 / 4.3125.32.100
1. General Information
Wind transmitters are employed to determine the wind
direction and to convert this into an electrical digital
signal. These signal can be transmitted to display
instruments or - with the aid of suitable transducer - to
recording instruments.
The instruments are equipped with an electronically
regulated heating system for winter use. This heating
system prevent the ball-bearing and the external rotating
parts from freezing.
The electrical power supply to the wind direction
transmitter (heating system) is provided by an external
power supply unit, order no. 9.3388.00.000.
Lightning
rod
,
order
no.
4.3100.99.000
is
recommended when the instrument is to be used in areas
with considerable thunderstorm activity.
2. Set up and mode of operation
A code disk is attached to a low-inertia light-metallic wind vane. This code disk has been provided with a
Gray code which is scanned opto-electronically.
The goniometry at the instruments 4.3121.32.000 occurs automatic (parallel output). The angle is actualised
at the 8 bit output all 2 ms.
The goniometry at the instrument 4.3125.32.100 occurs on request (serial output). The output of the serial
angle value occurs synchronous to a lined up interval signal. The first interval signal starts the measurement.
The following interval signals transmit the angle value serial (16 bit)
The external parts are made of corrosion-resistant materials and coated with a finish. Labyrinth sealing and
o-rings are used to protect the sensitive interior parts from precipitation
The delivery consists of an unassembled wind indicator - in order to reduce the bulk of the package and to
avoid transport damage - and the following additional items:
1 assemble case
1 wind vane
1 plug
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3. Technical data
Order – no. with heating
4.3121.32.000
4.3125.32.100
Measuring range
0...360°
Accuracy / Resolution
2,5°
Output
8 bit parallel
Output code
serial synchronous
Gray Code (Thies special)
Output level (unloaded)
0,5 V ... Vcc
0 V ... Vcc
Output load
max. 10 mA
Output rate
500 Hz
variable (abhängig vom Empfänger)
Steps per 360°
144
Damping rate
0,2 … 0,3
Sensitivity of response
0,5 m/s at 30° indicator deflection
Operating voltage
Current (unloaded)
5 ... 18 V DC
3,5 … 18 V DC
min. 0,6 mA (Vcc 5 V)
ca. 30 µA (Vcc 4,2 V)
max. 1,5 mA (Vcc 18 V)
ca. 150 µA (Vcc 15 V)
Ambient temperature
-35...+80°C
Max. wind load
60 m/s
Heating (at type. 32...)
24 V DC/AC, ca. 20 W, regulated electronically
19 pole plug in shaft
Dimensions
7 pole plug in shaft
550 mm wide, 415 mm high
Mounting
Onto a mast tube 1 ½“, for example DIN 2441
Weight
1,8 kg
4. Connection diagram
4.3121.32.000
4.3125.32.100
Heating
20 W
Heating
20 W
7 pole Binder plug
A B C D E F G H
19 pole Euchner plug
1 2 3 4 5 6 7
Shield
1 2 3 4 5 6 7 8 9 1011 1213141516171819
A B C D E F G H
8 - bit - Gray - Code
Hz Hz
Wind direction
Power
Heating
24 V AC / DC
20 W
Data
Clock
+
Power
Vcc
Earth
Hz Hz
Shield
Wind direction
Operating without heating
Pin 12, 13, 14 and 15 not connected
Operating without heating
Pin 5 and 6 not connected
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5. Preparation for use
5.1 Selecting the measuring site
In general, wind measuring instruments are supposed to record wind conditions over a large area. In order to
obtain comparable values for the determination of surface wind, measurements should be made at a height
of 10 m above open, level terrain. Open, level terrain is defined as an area where the distance between the
wind measuring instrument and an obstruction amounts to at least 10 times the height of the obstruction. If
this condition cannot be guaranteed, then the wind measuring instrument should be set up at such a height
where the measured values are, to the greatest extent possible, not influenced by local obstructions (approx.
6 - 10 m above the obstruction).
The wind measuring instrument should be installed in the centre of float roofs - not at the edge - in order to
avoid a possible influence in one direction or the other.
Cap nut
5.2 Mounting the wind vane
Unscrew the cap nut (SW 8) from the case of
the direction transmitter. Keep the rubber
sealing ring in the protective cap. Insert the
wind vane in such a manner that the dowel pin
counterbalances with the nut in the protective
cap. Then replace the nut. When doing so,
please make sure that you hold the transmitter
by the protective cap and not by the wind
indicator.
Wind vane, compl.
Dowel pin
Axle
Protection cap
5.3 Mounting the wind direction transmitter
The transmitter can be mounted onto a tube of R 1 1/2" (outer diameter ∅ 48,3 mm), 50 mm long. The internal
diameter of the pipe must be at least 40 mm since the transmitter will be plugged into an electrical system at
its base.
Solder a flexible control line LiYCY with the required number of leads of 0,5 mm2 onto the enclosed plug (see
circuit diagram).
Following the electrical connection, set the wind transmitter onto the tube and align it by means of the
marking on the case to North. Fasten the instrument onto the shaft with the aid of the 2 hexagonal screws
(electrical connection to a display instrument or to a recording instrument should be carried out according to
the circuit diagram enclosed with complete system).
6. Maintenance
If properly installed, the instrument requires no maintenance. Heavy pollution can lead to blockage of the
slots between the rotating and the stable parts of the transmitter. Thus it is advisable to remove the
accumulated dirt from the instrument periodically.
Certain symptoms of wear and tear can appear on the ball bearings after years of use. These symptoms are
expressed in a lowered sensitivity of response on the part of the wind vane. Should such a defect occur, we
recommend that you return the instrument to the factory for repair.
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ADOLF THIES GmbH & Co. KG
Hauptstraße 76
37083 Göttingen Germany
P.O. Box 3536 + 3541
37025 Göttingen
Phone ++551 79001-0
Fax ++551 79001-65
www.thiesclima.com
[email protected]
- Alterations reserved 4-4
020912/12/01